Here’s the short answer: However, it indirectly depends on ATP.
Let’s break that down. Secondary active transport does not directly hydrolyze ATP. Instead, it harnesses the energy stored in an electrochemical gradient—typically a sodium (Na⁺) or hydrogen (H⁺) gradient—to move another molecule against its concentration gradient. The Longer Explanation: Indirect Use of ATP If secondary active transport doesn’t use ATP directly, where does the energy come from? does secondary active transport use atp
It’s a fair question. Primary active transport (like the sodium-potassium pump) clearly uses ATP. Passive transport uses no energy at all. Secondary active transport sits in the middle—and that’s where the confusion begins. Here’s the short answer: However, it indirectly depends